Robson Dam Reservoir Report
Nearby: Greene County Dam Muir Dam
Last Updated: December 13, 2025
Robson Dam, located in Perry, Iowa along the TR-Raccoon River, was completed in 1960 and stands at a height of 25 feet with a length of 526 feet.
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Summary
The dam was designed by the USDA NRCS and serves the primary purposes of fire protection, stock, and small fish pond. Owned privately, the dam is regulated by the Iowa Department of Natural Resources and is subject to permitting, inspection, and enforcement by state authorities.
With a storage capacity of 77 acre-feet, Robson Dam has a low hazard potential and a moderate risk level. The dam is constructed of earth and soil foundations, with an uncontrolled spillway type. Despite not being rated for condition assessment, the dam meets operational guidelines and serves as a vital resource for water management in the region. The dam's location in Greene County, Iowa contributes to the overall water resource management system in the area.
Water resource and climate enthusiasts will appreciate the role that Robson Dam plays in providing essential water storage for fire protection, livestock, and recreational purposes in the region. The dam's presence along the TR-Raccoon River highlights the importance of sustainable water management practices in mitigating potential risks and ensuring the safety of surrounding communities. As a privately owned structure, Robson Dam represents a collaborative effort between state agencies, designers, and owners to maintain a reliable water infrastructure for the benefit of both people and the environment.
Year Completed |
1960 |
Dam Length |
526 |
Dam Height |
25 |
River Or Stream |
TR-RACCOON RIVER |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
0.38 |
Nid Storage |
77 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Raccoon River Near Jefferson
|
530cfs |
Middle Raccoon River Near Bayard
|
121cfs |
Middle Raccoon River At Panora
|
92cfs |
South Raccoon River At Redfield
|
268cfs |
Des Moines River Near Stratford
|
1720cfs |
Raccoon River At Van Meter
|
1640cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Robson Dam